Arvid Anderson 14-11 #1H

12/15/2010

Brigham Exploration Company (BEXP) reported the completion of five wells targeting the Bakken formation on its acreage in North Dakota.

The Arvid Anderson 14-11 #1H well had an early 24 hour peak flow rate of 3,191 barrels of oil equivalent (BOE), composed of 2,834 barrels of oil and 2.14 million cubic feet of natural gas per day. The Arvid Anderson 14-11 #1H well was completed with a 38 stage hydraulic fracturing operation and is located in Mountrail County, North Dakota.

The Roger Sorenson 8-5 #1H well had an early 24 hour peak flow rate of 2,658 BOE, composed of 2,347 barrels of oil and 1.87 million cubic feet of natural gas per day. The Roger Sorenson 8-5 #1H well was completed with a 38 stage hydraulic fracturing operation and is located in Mountrail County, North Dakota.

The Heen 26-35 #1H well had an early 24 hour peak flow rate of 3,791 BOE, composed of 3,425 barrels of oil and 2.19 million cubic feet of natural gas per day. The Heen 26-35 #1H well was completed with a 38 stage hydraulic fracturing operation and is located in Williams County, North Dakota.

The Brakken 30-31 #1H well had an early 24 hour peak flow rate of 3,573 BOE, composed of 2,804 barrels of oil and 4.61 million cubic feet of natural gas per day. The Brakken 30-31 #1H well was completed with a 30 stage hydraulic fracturing operation and is located in Williams County, North Dakota.

The Lippert 1-12 #1H well had an early 24 hour peak flow rate of 2,214 BOE, composed of 2,000 barrels of oil and 1.29 million cubic feet of natural gas per day. The Lippert 1-12 #1H well was completed with a 31 stage hydraulic fracturing operation and is located in Williams County, North Dakota.

Brigham Exploration Company is currently operating seven rigs developing the Bakken formation in North Dakota and Montana. The company is adding an eighth rig in May 2011.

Brigham Exploration Company plans to start hydraulic fracturing operations on the Swindle 16-9 #1H and Johnson 30-19 #1H wells in the first quarter of 2011. Both these Bakken wells are in Roosevelt County, Montana.